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  <h1 class="topictitle1">GaussDB(DWS)备份或恢复失败时，进行网络连通性检查</h1>
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    <h4 class="sectiontitle"><span style="color:#5B9BD5;">故障现象</span></h4>
    <p>执行GaussDB(DWS)备份或恢复任务失败，任务详情包含“执行Roach命令失败”。</p>
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    <h4 class="sectiontitle">可能原因</h4>
    <ol>
     <li>GaussDB(DWS)节点与<span>本产品</span>网络不通。</li>
     <li>在GaussDB(DWS)节点开启了防火墙，但未开放GaussDB(DWS)备份恢复所需端口。</li>
    </ol>
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    <h4 class="sectiontitle">处理建议</h4>
    <p>请参考<a href="https://forum.huawei.com/enterprise/zh/thread/685609359847079936" target="_blank" rel="noopener noreferrer">检测网络连通性</a>确认网络连通性：</p>
    <ul>
     <li>如果是原因1，请修复网络。</li>
     <li>如果是原因2，请开放GaussDB(DWS)备份和恢复任务所需端口，具体请参见<a href="https://support.huawei.com/enterprise/zh/doc/EDOC1100385841?idPath=7919749|251366268|250389224|251366267|258115661" target="_blank" rel="noopener noreferrer">通信矩阵</a>。</li>
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     <strong>父主题：</strong> <a href="DWS_00109.html">常见问题</a>
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